Adage Capital Partners’s Waystar Holding Corp WAY Stock Holding History

Adage Capital Partners’s Portfolio WAY Stock Details WAY Fund Activity

Bought

Maintained

Sold

Quarter	Market Value	Status	Shares	Change in Stake	Trade Value	Portfolio Weight	Portfolio Position
2026 Q2	$642K	Sell	31,274 -273,776	-90%	-$5.76M	﹤0.01%	902
2026 Q1	$7.35M	Sell	305,050 -800,404	-72%	-$21.2M	0.01%	737
2025 Q4	$36.2M	Buy	1,105,454 +421,220	+62%	+$15M	0.05%	324
2025 Q3	$25.9M	Buy	684,234 +580,234	+558%	+$21.5M	0.04%	397
2025 Q2	$4.25M	Sell	104,000 -128,000	-55%	-$4.93M	0.01%	722
2025 Q1	$8.67M	Sell	232,000 -349,044	-60%	-$13.8M	0.02%	613
2024 Q4	$21.3M	Sell	581,044 -26,951	-4%	-$829K	0.04%	429
2024 Q3	$17M	Buy	607,995 +7,995	+1%	+$197K	0.03%	497
2024 Q2	$12.9M	Buy	+600,000	New	+$13M	0.02%	552

Other funds holding WAY

EFM

EQT Fund Management Luxembourg $863M AUM 26.03% 1-Year Est. Return

Canada Pension Plan Investment Board Toronto Ontario, Ontario, Canada $181B AUM 41.77% 1-Year Est. Return

BlackRock New York $6.73T AUM 46.02% 1-Year Est. Return

Fidelity Investments Boston, Massachusetts $2.3T AUM 54.33% 1-Year Est. Return

BCI

Bain Capital Investors Boston, Massachusetts $4.82B AUM 35.43% 1-Year Est. Return

Advent International Boston, Massachusetts $17.7B AUM 5.23% 1-Year Est. Return

Vanguard Portfolio Management Malvern, Pennsylvania $2.22T AUM

GAM

Goldentree Asset Management New York $1.72B AUM 1.39% 1-Year Est. Return

Vanguard Capital Management Malvern, Pennsylvania $4.68T AUM

Bank of Montreal Toronto, Ontario, Canada $304B AUM 35.64% 1-Year Est. Return

Adage Capital Partners's WAY Position: Q2 2026 in Review

Adage Capital Partners reduced its Waystar Holding Corp (WAY) stake by 90% in Q2 2026, selling an estimated $5.76M and leaving 31,274 shares worth $642K. The position accounts for ﹤0.01% of the portfolio, ranked #902.

Adage Capital Partners first reported a position in WAY in Q2 2024 and has held it in 9 quarters since. The position peaked at $36.2M in Q4 2025. 301 funds tracked by Wall St. Rank hold WAY as of Q2 2026.

Adage Capital Partners held 31,274 shares of Waystar Holding Corp worth $642K as of Q2 2026.
Adage Capital Partners sold 273,776 Waystar Holding Corp shares in Q2 2026, an estimated $5.76M.
Waystar Holding Corp made up ﹤0.01% of Adage Capital Partners's portfolio in Q2 2026, its #902 holding.
Adage Capital Partners first reported a position in Waystar Holding Corp in Q2 2024 and has held it in 9 quarters since.
Adage Capital Partners's Waystar Holding Corp position peaked at $36.2M in Q4 2025.
301 funds tracked by Wall St. Rank held Waystar Holding Corp as of Q2 2026.

Based on Adage Capital Partners's 13F filing for Q2 2026, filed 14 Aug 2026.